Conduit end fitting



Oct. 9, 1928.

F. I. JOHNSON CONDUIT END FITTING Filed Sept. 15. 1922 attuned,

Patented Oct. 9, 1928.

N D STATES PATENT OFFICE.

imam JOHNSON, F} W R 33 1363 SS QR BY ME$ E I MEN-ITS, roorzoncnw. ,tormson, or nos ron, massncnusiirrsfl coiwnurr END rrrrrne.

. Application filed September 15, 1 922. Serial No. 588,502.

, This invention relatesto-conduit end fittings for electric wiring more' particularly to a so-called service entrance cap which is adapted to be connected tothepipe or conduit through which the wires are being led to a building and the object of this invention is to. provide a cap of this character with a separate closure plate the same having an insulating bushing which is locked in the plate when theplate ispositioned in the cap. A further object of the invention is the provision of a hole or opening through the plate spaced inwardly from the periphery thereof so that an insulating bushing may be retained in thehole' against lateral displacement.

Alstill further job'ect of this invention is the provision of an lnternally threaded conduitend receivingcollar which is rotatably connected to the cap plate whereby the cap may be rotated about the axis of the collar to permit its flat side to be further rotated and positioned against the side of the building, even after the conduit has been screwed tightinto collar. I a,

With these and other objects in view, the

invention consists of certain novel features of construction, as will be more fully described, and particularly pointed out in the appended claims;

Figure 1 is a sectional side elevation of my improved cap as secured to the end of a conduit. a

Figure 2 is an underneath View of the cap showing the closure plate in position therein.

Figure 3 is a perspective view of the closure plate with the insulating bushing removed therefrom. I

Figure 4 is a detail View of the insulating bushing. i

Figure 5' is a sectional view of the bushing on line 55 of Figure 4. v

It is found in practice of advantage in the construction of a. service entrance cap of this character to provide a separate and independent closure plate to be readily secured in positioninthe cap and to mount in this plate an insulating bushing, and also a swivel conduit end receiving collar, and to so arrange the plate that it may be readily connected to the cap, whereby the cap may' is a detaildescription of one means whereby these results may be accomplished.

With reference tothe drawings, designates the cap shaped body member which is substantially circular in plan, having a fiattened rear side position as at 11 to permit the cap to set flat against the side of the building to which the conduit is attached. 7

In the rear flattened portion of this cap, 1. have formed indentations 12-,thereby' pressing portions of the stock inwardly as at 13,

forming protuberances on the inner face of the cap for-the purpose presently described. In order to close the bottom portion of'this cap,"I have provided aplate 14 which is also substantially circular in plan with the flat tened rear side 1.5 to fit the corresponding side of the cap. This plate is'also provided with an opening 16 arcuate in shape into which a bushing 17 of insulating material is set. This bushing is preferably provided with a shoulder 18 adapted to set against the inner face of this plate and the upper edge 19 of thisbushing is adapted to engage the inner surface of the cap when the plate is positioned therein to lock the bushing in position' when the plate is positioned in the cap, as illustrated in F igure 1. This bushing is provided with a plurality of wire receiving holes 20, the middle hole 21 is counterbored on its inner face to receive a closing plug or washer 22 so that when only the two holes are to be used, the third hole QLmay be rotated about the axis of this collar even after the end of the conduit has bottomed in the collar which is often of advantage andeven found to be necessary in order to bring the flattened surface 11 of the cap against or opposite the side of the building that supports the wire conduit, without splitting the cap or stripping the thread.

In positioning this plate into the cap, it is only necessary to set its rear edge 15 over or above the protuberances 13 then lift the front edge and insert the locking screw 26 beneath the opposite edge of plate which is an extremely simple operation and by thus positioning this plate in the cap, the insulating bushing is securely locked in its opening in the plate. My improved service entrance cap is extremely simple and practical in construction and eli'ective in its operation and by its use the conduit end is effectually covered and at the same time the parts are rendered very accessible.

The foregoing description is directed solely towards the construction illustrated, but I desire it to be understood that I reserve the privilege of resorting to all the mechanical changes to which the device is susceptible, the invention being defined and limited only by the terms of the appended claims.

I claim:

1. A conduit end fittin comprising a plate having a hole therein located inwardly from the peripheral edge thereof, an insulating bushing having a reduced portion of substan tially the size of said hole extending from the inner side of said plate outwardly through said hole, a cap over the plate and bushing and engaging said bushing to secure it in said hole against inward movement, and means for securing said fitting to a conduit end.

2. A conduit end fitting comprising a plate having a hole through it located inwardly from the periphery of its edge, a bushing of insulating material in said hole having portions for engaging one side of said plate to preventits passing through said hole, means engaging said plate for securing it to a conduit, a cap for covering said plate and engag ing said bushing to secure it in place against inward moven'ient, and cooperating fixed and movable means forlocking said cap against removal from said plate.

3. A conduit end fitting comprising a plate having a hole through it located inwardly from the periphery of its edge, a bushing of insulating material in said hole, a shoulder on said bushing for engaging one side of said plate to prevent its passing through said hole, means engaging said plate for securing it to a conduit, :1 cap having a portion engaging said bushing to prevent its removal from said plate and an integral lug and a movable screw on said cap beneath said plate to hold said cap in place.

In testimony whereof I afiix my signature.

FREDERICK I. JOHNSQN. 

